超宽带SAR脉冲卷积干扰效果分析  

Effect Analysis of Pulse Convolution Jamming Technique Countering UWB SAR

作　　者：沈爱国[1] 姜秋喜[1] 

机构地区：[1]电子工程学院,安徽合肥230037

出　　处：《现代防御技术》2010年第1期94-98,共5页Modern Defence Technology

摘　　要：研究脉冲卷积干扰对超宽带SAR距离像和二维像的干扰效果时,发现在二维图像中,干扰图像的方位向聚焦性能明显下降。通过对信号处理流程的分析,发现超宽带SAR空变特性是导致二维图像散焦的根本原因。为此,提出对干扰信号进行相位调制,调整干扰信号的分布曲线,以降低空变特性的影响,取得了较好的干扰效果,仿真结果验证了理论分析的正确性。In terms of the feasibility of using pulse convolution technique to jam the ultra wide band （UWB） synthetic aperture radar （SAR）, the jamming effects of both range profile and two dimensional images are analyzed and simulated. But the image of jamming signal cannot focus completely on the two dimensional image. The space variant is the main reason causing the image degradation. To reduce the effect of the space variant, an extension of the pulse convolution technique which modulating the phase of the jamming signal is introduced here. The study shows that this method can get a delayed false range profile similar to the one used in general radars The improved technique enhances the performance of jamming the UWB SAR greatly and the simulation result confirms its validity .

关 键 词：雷达干扰 超宽带 合成孔径雷达 卷积 移频 

分 类 号：TN958[电子电信—信号与信息处理] TN972[电子电信—信息与通信工程]